612806243 has 4 divisors (see below), whose sum is σ = 700350000. Its totient is φ = 525262488.

The previous prime is 612806231. The next prime is 612806261. The reversal of 612806243 is 342608216.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-612806243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (612806203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43771868 + ... + 43771881.

It is an arithmetic number, because the mean of its divisors is an integer number (175087500).

Almost surely, 2^612806243 is an apocalyptic number.

612806243 is a deficient number, since it is larger than the sum of its proper divisors (87543757).

612806243 is an equidigital number, since it uses as much as digits as its factorization.

612806243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87543756.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 612806243 is about 24754.9236112738. The cubic root of 612806243 is about 849.3911409074.

The spelling of 612806243 in words is "six hundred twelve million, eight hundred six thousand, two hundred forty-three".